Beyond the mitochondrion: cytosolic PINK1 remodels dendrites through protein kinase A.
Beyond the mitochondrion: cytosolic PINK1 remodels dendrites through protein kinase A.
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DOI:
10.1111/jnc.12494
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发表时间:
2014-03
影响因子:
4.7
通讯作者:
Chu CT
中科院分区:
文献类型:
--
作者:
Dagda RK;Pien I;Wang R;Zhu J;Wang KZ;Callio J;Banerjee TD;Dagda RY;Chu CT
The subcellular compartmentalization of kinase activity allows for regulation of distinct cellular processes involved in cell differentiation or survival. The PTEN-induced kinase-1 (PINK1) is a neuroprotective kinase localized to cytosolic and mitochondrial compartments. While mitochondrial targeting of PINK1 is important for its activities regulating mitochondrial homeostasis, the physiological role of the cytosolic pool of PINK1 remains unknown. Here, we demonstrate a novel role for cytosolic PINK1 in neuronal differentiation/neurite maintenance. Overexpression of wild-type PINK1, but not a catalytically inactive form of PINK1(K219M), promoted neurite outgrowth in SH-SY5Y cells and increased dendritic lengths in primary cortical and midbrain dopaminergic neurons. To identify the subcellular pools of PINK1 involved in promoting neurite outgrowth, we transiently transfected cells with PINK1 constructs designed to target PINK1 to the outer mitochondrial membrane (OMM-PINK1), or restrict PINK1 to the cytosol (ΔN111-PINK1). Both constructs blocked cell death associated with loss of endogenous PINK1. However, transient expression of ΔN111-PINK1, but not of OMM-PINK1 or ΔN111-PINK1(K219M), promoted dendrite outgrowth in primary neurons, and rescued the decreased dendritic arborization of PINK1-deficient neurons. Mechanistically, the cytosolic pool of PINK1 regulated neurite morphology through enhanced anterograde transport of dendritic mitochondria and amplification of PKA-related signaling pathways. Our data supports a novel role for PINK1 in regulating dendritic morphogenesis.
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影响因子:
3
作者:
Dagda, Ruben K.;Chu, Charleen T.
通讯作者:
Chu, Charleen T.
影响因子:
4.8
作者:
Grewal, SS;Fass, DM;Stork, PJS
通讯作者:
Stork, PJS
影响因子:
4.8
作者:
Becker, Dorothea;Richter, Judith;Voos, Wolfgang
通讯作者:
Voos, Wolfgang
影响因子:
8.6
作者:
Cookson, Mark R.
通讯作者:
Cookson, Mark R.
DOI:
10.1083/jcb.201002108
发表时间:
2010-08-23
期刊:
The Journal of cell biology
影响因子:
--
作者:
Cherra SJ 3rd;Kulich SM;Uechi G;Balasubramani M;Mountzouris J;Day BW;Chu CT
通讯作者:
Chu CT